Ctemform Spvhrs of Cei/lon, /iannahj (Cv. 341 



calamlstro carent \\xc aliicquc species Inclo-Malajanaj generis 

 Acaitt/ioctcni, milii, notaj.") 



One wouKl scarcely iiopc to determine tlic iilentlty of this 

 species tVoni a tlescription taken from an immature female. 



1891-92. A canthoctenus dimidiatuSf Tlior. ^ ad., 9.f mm. 

 Ann. Mns. Gcnov. ser. 2 a, xi. (xxxi.) p. 112. Mt. 

 Singalang, Sumatra {Beccari). 



Measurements (sec. Tlior.). — Tot. len. 9'75 mm., carap. 5^, 

 ant. marg. 1-75 ; legs i. 27-75, ii. 25, iii, 22-5, iv. ;J0§ ; 

 pat. + tib. iv. 9*75. 



''Palpi longi, graciles, clava patellas anticas latitudine 

 circiter a3qnanti. Pars patcllaris 2^-3-plo longior est qu vm 

 latior, pars tibialis ca non parum longior et saltem basi 

 pauUo angu.stior, pa3ne cylindrata, a basi ad apicem sensim 

 modo levissime incrassata ; latus ejus exterius prope apicem 

 in dentem conicum acuminatum anteriora versus et foras 

 directum excurrit, cujus longitudo \ diametri partis tibialis 

 vix su{)erat. 



" Pars tarsalis — circa triplo longior est quam latior. 

 Bulbus parum plus dimidium basale partis tarsalis occupat. 

 Breviter subellipticus est, modice altus et complicatus, in 

 medio lateris exterioris, subter, elevationem nitidam sub- 

 ovatam sat magnam ostendit, et prope eam, in medio subter, 

 partem quandam ferrugineam, qute, quam a latere exteriore 

 inspicitur bulbus, postice dentem deorsum directum pro- 

 curvum ibidem formare videtur, pra^terea vero in procursum 

 gracilem porrectum apice profundo bifidum sive furcatum 

 excurrit. 



"Ceph. et abd. subfuscis^ fascia media angusta alba ab 

 oculis ad anum ducta ornatis, abdominis dorso pr;i3terea 

 saltem posterius ordinibus duobus longitudinalibus macu- 

 larum niagnarum nigrarum notato." 



An adult male, obviously belonging to tliis genus, but 

 specifically distinct from Thorell's species, is now before me 

 from Borneo. One can well understand Thorell's supposition 

 as to its being congeneric with Acanthoctenus^ ^qjs.^ of 

 which the type is before me. 



1891-92. Acanthoctenus hetus, Thor. (^ ad., lOf mm. 



Ann, Mus. Genov. ser. 2 a, xi, (xxxi.) p. 146. Sarawak, 



Borneo [Doria e Beccari). 



Aleasurements. — Tot, len, lOf mm., carap, 5*5, ant. 



marg. 1"75 ; legs i. 32, ii. 28'25, iii. 24'5, iv. 36; pat. + 



tib, iv. 10"5. 



" Palporum clava — pars eorum patcllaris duplo et diraidio 

 longior est quanj latior ; pars tibialis ea saltem j longior est. 



